Scullery can propose the tidy version. The cook decides what is true.
Captured methods can be hard to follow. A caption may run several actions together, shorthand may hide an important detail, or the sequence may only make sense to the person who wrote it.
Improve can suggest a cleaner sequence of instructions, split or combine steps, and make shorthand more explicit. It uses ingredient names as context but does not rewrite the ingredient list.
Scullery shows the original and suggested methods side by side. Nothing changes until you choose Use improved; Keep original leaves the draft untouched. The review keeps a useful suggestion from becoming an unexamined fact.